*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html,body{
    width:100%;
    overflow-x: hidden;
}
img{
    display: block;
}
.top {
    width: 100%;
    position: relative;
}
.top img{
    width: 100%;
}
.click_box{
    width: 100%;
    position: relative;
    height: auto;
}
.click_bg{
    width: 100%;
}
.position_box{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}
.click_btn{
    width: 251px;
    margin-left: calc((100% - 251px) / 2);
}

